On June 25, 2017, the national organization Millions Marching For Medicare 4 All organized a rally on the plaza of the Federal Building in downtown Seattle. They came to voice their support for a national single-payer health care plan based on Medicare. Medicare is the single-payer, national social insurance program administered by the federal government since 1966. As of 2015, more than 55 million Americans received coverage through the Medicare program. This demand for a modified health care system came on the heels of the election of Republican President Donald J. Trump, who made repealing the Affordable Care Act a campaign promise. The rally was scheduled to take place between 11 am and noon.